Picture recorder/reproducer and method thereof

Abstract

According to the invention, as received stream data is analyzed a sequence header is retrieved and stream data after the detected sequence header is written to storage unit when a recording initiation command is received, a recorded file is generated with a sequence header having image format information required to reproduce stream data immediately after the recording initiation command at the head. As when a reproducing command is received, stream data after the sequence header is read from the storage unit and an image and voice are reproduced, the recorded stream data can immediately normally reproduced without delay and therefore, data acquired by recording stream data used for digital broadcasting and others can be smoothly reproduced.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a picture recorder / reproducer and a method for recording stream data composed of compressed video / voice information and reproducing images and voice from recorded stream data.[0003]2. Description of the Related Art[0004]Digital broadcasting is started and has been able to be received by a personal computer. The capacity of a hard disk mounted in a personal computer has also increased. Then, it is conceivable that the opportunity to record and reproduce stream data used for digital broadcasting utilizing a personal computer will be increased in future.[0005]In case stream data used for digital broadcasting is recorded, it is possible to record stream data in a storage device such as a hard disk since a user issues a recording initiation command.[0006]When stream data is reproduced, data after a sequence header is normally reproduced by referring to the sequence header having image format ...

AI Technical Summary

Benefits of technology

[0014]As the stream data after the sequence header is read from the storage means and images and voice are reproduced when a reproducing command is issued, the recorded stream data can be immediately normally reproduced without delay and therefore, data acquired by recording stream data used for digital broadcasting and others can be smoothly reproduced.

[0016]As the stream data after the sequence header is read from the storage means and images and voice are reproduced when the reproducing command is issued, the stream data since the recording initiation command can be immediately normally reproduced without loss and therefore, data acquired by recording stream data used for digital broadcasting and others can be smoothly reproduced.

Problems solved by technology

Therefore, in a conventional type recording / reproducing method, it is also possible to record stream data before the sequence header in a storage device since the recording of stream data is started at arbitrary time at which a user tries to record it, however, stream data without the sequence header is not normally reproduced and becomes noise.

Further, as stream data without a sequence header is also read as recorded data in reproducing, time loss occurs until data after a sequence header is output as normal video / voice data.

Hei 11-69308 for example), however, there is no patent application in which improvement is tried from such a viewpoint.

As described above, in the conventional type recording / reproducing method, stream data in a period since a recording initiation command is issued until the next sequence header emerges is not only normally reproduced even if the stream data is recorded but there is a problem that time loss occurs until normal reproduction is enabled.

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